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The most profound truths are often the simplest.
When stocks are attractive, you buy them. Sure, they can go lower. I've bought stocks at $12 that went to $2, but then they later went to $30. You just don't know when you can catch the bottom.
有了图书馆,你是自由的,不受暂时政治气候的限制。它是最民主的机构,因为没有人——绝对没有人——能告诉你该读什么、什么时候读以及如何读。
在人工智能领域取得成功的关键是在数学和统计学方面有坚实的基础。